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首页> 外文期刊>Journal of Materials Research >Photophysical And Photocatalytic Properties Of Li_2m(wo_4)_2rn(m = Co And Ni)
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Photophysical And Photocatalytic Properties Of Li_2m(wo_4)_2rn(m = Co And Ni)

机译：Li_2m（wo_4）_2rn（m = Co和Ni）的光物理和光催化性能

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摘要

Li_2M(WO_4)_2 (M = Co and Ni) were synthesized by a conventional solid-state reaction method and characterized by powder x-ray diffraction, Brunauer-Emmet-Teller (BET) measurement, ultra violet-visible (UV-vis) diffuse reflectance spectra, Raman spectroscopy, and photocatalytic evaluation measurements. Photocatalytic water splitting results showed that Li_2M(WO_4)_2 (M = Co and Ni) exhibited abilities for H_2 evolution with Pt cocatalyst from an aqueous methanol solution and for O_2 evolution from an aqueous AgNO_3 solution under UV light irradiation. Theoretical calculation, absorbance analysis, and photocatalytic H_2 evolution experiment revealed that the position of W 5d level shifted to the negative side with respect to the reduced potential of H~+/H_2. The photocatalytic H_2 evolution over Li_2M(WO_4)_2 is discussed from the view of crystal and electronic structure point.
机译：Li_2M（WO_4）_2（M = Co和Ni）是通过常规的固态反应方法合成的，并通过粉末X射线衍射，Brunauer-Emmet-Teller（BET）测量，紫外可见（UV-vis）表征漫反射光谱，拉曼光谱和光催化评估测量。光催化分解水的结果表明，Li_2M（WO_4）_2（M = Co和Ni）在紫外光照射下具有与Pt助催化剂一起从甲醇水溶液中析出H_2和从AgNO_3水溶液中分解出O_2的能力。理论计算，吸光度分析和光催化H_2析出实验表明，相对于H〜+ / H_2的降低电位，W 5d的位置向负方向移动。从晶体和电子结构的角度出发，讨论了Li_2M（WO_4）_2上光催化H_2的演化。

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